ice: switch: fix potential memleak in ice_add_adv_recipe()

ice: switch: fix potential memleak in ice_add_adv_recipe()

[ Upstream commit e7a1d45d0ca46a9c21291b02f5268b67ae4c5c00 ]

When ice_add_special_words() fails, the 'rm' is not released, which will
lead to a memory leak. Fix this up by going to 'err_unroll' label.

Compile tested only.

Fixes: d8d7095ca94a ("ice: low level support for tunnels")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>